NEC uPD78056Y - Manual (Page 529)

529
CHAPTER 23 STANDBY FUNCTION
(d) Clear upon RESET input
When a RESET signal is input, the HALT mode is released, and as is the case with normal reset
operation, a program is executed after branch to the reset vector address.
Figure 23-3. HALT Mode Release by RESET Input
Remarks 1. f X : main system clock oscillation frequency
2. ( ): f X : 5.0 MHz
Table 23-2. Operation after HALT Mode Release
Release Source MK
××
PR
××
IE ISP Operation
Maskable interrupt 0 0 0
×
Next address instruction execution
request 0 0 1
×
Interrupt service execution
0 1 0 1 Next address instruction execution
0 1 × 0
0 1 1 1 Interrupt service execution
1 Ч Ч Ч HALT mode hold
Non-maskable interrupt – –
Ч Ч
Interrupt service execution
request
Test input 0 –
Ч Ч
Next address instruction execution
1 –
Ч Ч
HALT mode hold
RESET input – – Ч Ч Reset processing
Remark x: Don't care
HALT
Instruction
RESET
Signal
Operating
Mode
Clock
Reset
Period
HALT Mode
Oscillation
Oscillation
stop
Oscillation
Stabilization
Wait Status
Operating
Mode
Oscillation
Wait
(2 17 /f x : 26.2 ms)